User Desired LED Blinking

STEP 1:

Open LX-Terminal.

Create a file with .py extension

Ex: nano userinput.py

Nano is a type of editor used to write the code in that file named userinput.

Type the following code in that file by insert key or by typing letter I on keyboard.

STEP 2:

Program:

#! /usr/bin/python

Import os

Import time

Import RPi.GPIO as GPIO

GPIO.setmode (GPIO.BCM)

GPIO.setwarnings (False)

GPIO.setup (17, GPIO.OUT)          //configuring 17^th pin as output

GPIO.setup (27, GPIO.OUT)          // configuring 27^th pin as output

#Setup variables for user input

led_choice = 0

count = 0

os.system (‘clear’)

print “which LED would you like to blink”

print “1: Red?”

print “2: Blue?”

led_choice = input (“choose your option: “)               //user choice

if led_choice  == 1:                                                       // select led to blink

os.system (‘clear’)

                    print  “You picked the Red LED”

                    count = input (“How many times would you like it to blink? :  ”)                                                                                                                         //user enter purpose

                    while count > 0 :

                                       GPIO.output (27, GPIO.HIGH)

                                       time.sleep (1)                         //to sleep for one second

                                       GPIO.output (27, GPIO.LOW)

                                      time.sleep (1)                        // to sleep for one second

                                      count = count-1

if led_choice == 2:                                                    // select led to blink

                   os.system (‘clear’)

                   print ”You picked the Blue LED”

                   count = input (“How many times would you like to blink? :  ”) //user enter purpose

                   while count  > 0 :

                                      GPIO.output (17, GPIO.HIGH)

                                      time.sleep (1)                    // to sleep for one second

                                      GPIO.output (17, GPIO.LOW)

                                      Time.sleep (1)                  // to sleep for one second        

                                      count = count-1

Save the file by typing  :wq and then press enter.

To check the output:Type python userinput.py

Output 1:

Output 2:

Output 3:

Output 4: